Guide by: Adrea, Source: Official KC Discord

• Unlocked: raise first heir into adulthood,
• Once the heirs reach adulthood, they can be married off to heirs of other lords on the server, earning the player even more state power.,
• Daily: Marry off your heirs – optional. Otherwise save heirs and rings for State Power Growth event which is accompanied by Time-limited Quest requesting marriages and giving gold.
• Once the heir reaches the max level, he/she is eligible for marriage. The heir can be married only to other players' heirs, heirs of one player cannot marry each other. Once the marriage between heirs is confirmed, the players earn their heir's partner's attributes, increasing their state power. The heirs can be married off only to heirs of the same rank/title/grade (e.g., 4th rank princess with 4th rank prince).
• Heirs can be married off in two ways:
  1. Arrange Marriage – "Specific Proposal" requires inserting a player´s UID – the player will receive the proposal offer which can be accepted or declined. "Global Proposal" allows any player on the server marry that heir – the offer can be shared in a server and/or alliance chat. But every player can marry the heir, no matter where the offer is shared. For both options, an item needed for the marriage needs to be chosen – a ring or gold (amount of gold increase with the heir's rank). If the marriage isn't accepted by another player in 24 hours, the offer will expire, and the item is returned.,
  2. Find Love – Offers fitting the heir (gender and rank) shared by other players on the server can be viewed. An item for the marriage needs to be chosen – a ring or gold.

"Marriage Announcements" show every marriage offer sent specifically to you by other players (through "Arrange Marriage" -> "Specific Proposal"). 

"Married Heir" lists all married heirs and to whom and when they were married. 

"Distant Journey" allows to send away unwanted heirs. These heirs won't be available for marriage (if they are not married yet) and sharing in the chat. Heirs sent to Distant Journey cannot return! Complete Distant Journey Achievements to earn small rewards (milk and marriage packs).